The U.S. Centers for Disease Control and Prevention said in a guidance Thursday healthcare facilities that are facing a "crisis" should consider options to combat shortages, even if those options "are not commensurate with U.S. standards of care."That includes using masks beyond their designated shelf life and re-using masks during encounters with different patients, cautioning however that not all types of masks can be reused. As a last resort, the agency said health care providers could consider using "homemade masks" — such as bandanas or scarves — to care for coronavirus patients, ideally in combination with a face shield.The guidance comes as hospitals and medical care workers have begun to sound the alarm on a rapidly vanishing inventory of supplies.Governors highlighted those concerns to the president Thursday, many saying their main worry was that there isn't enough personal protection equipment available in their states - like masks, disposable gowns and other supplies.President Donald Trump responded states should be working to get whatever equipment they need on their own and the federal government would help if it could."Try what you can — do the best you can to get what you can actually get," Trump said.Worries remain on looming shortages as health officials maintain the number of known coronavirus cases will continue to dramatically increase as more test results return."The number of test positives are increasing," said Dr. Deborah Birx, the White House coronavirus response coordinator. "That is a dramatically important signature that everyone is doing their job."Just in New York, Cuomo said Thursday morning 8,000 tests were done overnight."When you do 8,000 tests," the governor said, "the numbers are going to go up exponentially."De Blasio said the city will need the federal government's help in getting enough supplies to respond to those numbers."I said very clearly that for the month of March, we have the supplies that we need, the city has very strong reserves of the kind of supplies that I talked about," he said. "It is going into April that I'm worried about. I don't have the perfect day for you."We're assessing all the time, but it is a day, two weeks from now or three weeks from now where we must, by then, have had a very substantial resupply."

The U.S. Centers for Disease Control and Prevention said in a guidance Thursday healthcare facilities that are facing a "crisis" should consider options to combat shortages, even if those options "are not commensurate with U.S. standards of care."

That includes using masks beyond their designated shelf life and re-using masks during encounters with different patients, cautioning however that not all types of masks can be reused.

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As a last resort, the agency said health care providers could consider using "homemade masks" — such as bandanas or scarves — to care for coronavirus patients, ideally in combination with a face shield.

The guidance comes as hospitals and medical care workers have begun to sound the alarm on a rapidly vanishing inventory of supplies.

Governors highlighted those concerns to the president Thursday, many saying their main worry was that there isn't enough personal protection equipment available in their states - like masks, disposable gowns and other supplies.

President Donald Trump responded states should be working to get whatever equipment they need on their own and the federal government would help if it could.

"Try what you can — do the best you can to get what you can actually get," Trump said.

Worries remain on looming shortages as health officials maintain the number of known coronavirus cases will continue to dramatically increase as more test results return.

"The number of test positives are increasing," said Dr. Deborah Birx, the White House coronavirus response coordinator. "That is a dramatically important signature that everyone is doing their job."

Just in New York, Cuomo said Thursday morning 8,000 tests were done overnight.

"When you do 8,000 tests," the governor said, "the numbers are going to go up exponentially."

De Blasio said the city will need the federal government's help in getting enough supplies to respond to those numbers.

"I said very clearly that for the month of March, we have the supplies that we need, the city has very strong reserves of the kind of supplies that I talked about," he said. "It is going into April that I'm worried about. I don't have the perfect day for you.

"We're assessing all the time, but it is a day, two weeks from now or three weeks from now where we must, by then, have had a very substantial resupply."